Validation (based on tumour percentage)

## 
##  Pearson's product-moment correlation
## 
## data:  complete$gt_perTumor and complete$percentage_cancer
## t = 8.7954, df = 204, p-value = 6.016e-16
## alternative hypothesis: true correlation is not equal to 0
## 95 percent confidence interval:
##  0.4175849 0.6168401
## sample estimates:
##       cor 
## 0.5243537